JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
    <div id="top">Top</div>
    <div id="bottom">
        <a href="#" class="scroll-to-top">Scroll to top</a><br>
        <button class="scroll-to-top">Scroll to top</button>
    </div>
</div>

CSS

#wrapper {
    position:relative;
    width:400px;
    height:1300px;
    background: #f1f1f1;
}

#top {
    position:absolute;
    top:5px;
    left:5px;
}

#bottom {
    position:absolute;
    bottom:5px;
    left:5px;
}

JavaScript

$(function(){
    $('.scroll-to-top').on('click',function(){
        window.scrollTo(0,0);
        return false;
    })
})